4-Ethoxy-1,1,1-trifluoro-3-buten-2-one as a New Protecting Reagent in Peptide Synthesis
作者:M. G. Gorbunova、I. I. Gerus、S. V. Galushko、V. P. Kukhar
DOI:10.1055/s-1991-26420
日期:——
The 4,4,4-trifluoro-3-oxo-1-butenyl group is proposed as a suitable protecting group for the protection of the N-H terminal of amino acids in peptide synthesis. Amino acids react with 4-ethoxy-1,1,1-trifluoro-3-buten-2-one to give the N-protected amino acids, the protecting group can be removed by acidic hydrolysis. The formation of peptide bonds using on N-4,4,4-trifluoro-3-oxo-1-butenyl protected amino acids occurs without racemization.
Synthesis of Trifluoromethylpyrroles and Related Heterocycles from 4-Ethyloxy-1,1,1-trifluorobut-3-ene-2-one
作者:Rebecca J Andrew、John M Mellor
DOI:10.1016/s0040-4020(00)00598-6
日期:2000.9
Syntheses cf intermediate 4-dialkylamino-1,1,1-trifluorobut-3-ene-2-ones are described from 4-ethyloxy-1,1,1-trifluorobut-3-ene-2-one and alpha-aminoacids. In subsequent cyclisations pyrroles and other bicyclic heteroaromatics having trifluoromethyl substitution are obtained either by simple dehydration or with concomitant decarboxylation. (C) 2000 Elsevier Science Ltd. All rights reserved.